Removal of metal ions from electrochemical decontamination solution using organic acids. Issue 18 (12th December 2017)

• Record Type: Journal Article
• Authors: Naznin, Marufa; Choi, Jiyeon; Shin, Won Sik; Choi, Jaeyoung
• Is Part Of: Separation science and technology. Volume 52:Issue 18(2017)
• Page Start: 2888
• Page End: 2898
• Publication Date: 2017-12-12
• Subjects: Heavy metals -- electro-decontamination -- oxalic acid -- phosphoric acid -- cyclodextrin; Separation (Technology) -- Periodicals; 660.284205
• DOI: 10.1080/01496395.2017.1375955
• Languages: English
• ISSNs: 0149-6395

Abstract

ABSTRACT: Applicability of the organic acids and cyclodextrin (CD) for the removal of Fe, Co and Ni from the spent electro-decontamination solution was investigated. Oxalic acid showed the highest removal efficiency: 90% for 0.89 M Fe and 95% for 0.0089 M Co and Ni, respectively. The metal–oxalate precipitates were characterized by differential scanning calorimetry/thermogravimetry analysis (DSC/TGA), Fourier transform infrared (FTIR) and X-ray fluorescence (XRF). After thermal decomposition at >300°C, the metal–oxalate precipitates were transformed into metal oxides (Fe2 O3, FeO, CoO and NiO) and pure metals (Co and Ni). The results imply that organic acids have a high potential for the removal of heavy metals from electro-decontamination solutions.